Opening means for centrifugal bowls



` M. LEITCH. OPENING MEANS FOR CENTRIFUGAL BOWLS.

v APPLICATION FILED FEB. I4, 1919. 1,343,325.

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OPENING M EANS FOR CENTRIFUGAL BOWLS. APPLICATION F1LED F1;B. 14, 1919.

Patented June 15, 1920.

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ATTORNEY UNlTsn stares 4raient ottica.

MEREDITE LEITCH, 0F POUGHKEEPSIE, NEW YORK, ASSIG-NOR TO THE DE LAVALSEPARATOR COMPANY, 0F NEW YORK, N. Y., A CORPORATION OF NEW JERSEY.

OPENING MEANS FOR CENTRFU'GAL BOWLS.

Specification of Letters Patent.

Patented June 15, 1920.

, Application led February 14, 1919. Serial No. 276,886.

and useful Improvement in Opening Means' for Centrifugal Bowls, of whichthe following is a full, clear, and eXact description, reference beinghad to the accompanying drawings, which form a part of this specication.

My invention relates to means for unscrewing, from a centrifugal bowl,the nut that holds the parts thereof in an assembled relation. Theobject of my invention is to provide means attached to the centrifugalmachine frame for easily removing the bowl nut.

Many centrifugal bowls have a large bot tom, from the center of whichrises a hollow stem, screw-threaded on the outside of its upper end. Abowl shell, with its lower edge fitting against the large bottom,surrounds this stem and is held in place by a nut screwed thereon.Ordinarily, when it is desired to clean such a bowl, it is removed fromthe machine, carried to a more or less distant place and secured in aspecial clamping ring. A special wrench or Spanner is then applied tothe nut to remove it from the bowl. The clamping ring must be releasedbefore the bowl can be taken away for washing. When assembling themachine, this process must be reversed.

The object of my invention is to provide means on the frame of themachine for removing the nut without recourse to independent clamps,wrenches, etc.

In the accompanying drawings, which illustrate several embodiments of myinventionr- Figure 1 shows a separator bowl in section with the disksomitted.

Fig. 2 shows a separator frame provided with my invention, the bowlbeing shown in full lines in its normal working position and in dottedlines in position for removing the nut.

Fig. 3 is a front view of a portion of the frame showing one form of myinvention.

Fig. 4 is ahorizontal cross-section through same. Y

Figs. 5 and 6 are views, corresponding to Figs. 3 and 4, of another formof my invention.

Fig. 7 is aview, similar to Fig. 3, of an other yform of my invention.`

Fig. 8 is a vertical cross-section through same.

Figs. 9 and 10 are views, corresponding toV Figs. 7 and 8, of anotherform of my invention.

o represents the frame or stand for supporting the driving mechanism andthe frame 79, which in turn supports the bowl. c is the bowl bottom, dthe hollow stem, e the bowl shell and f the nut threaded on the end ofstem d and holding in place the bowl shell e.

In Figs. 3 and 4, the frame b carries two pins g, g and a guide pin hslightly smaller that the hole in the top of the bowl and locatedcentrally between the two pins g, g.

In Figs. 5 and 6, the frame carries two pins z', a', similar to pins g,g, and is provided with a socket j of a diameter slightly greater thanthe bowl nut.

ln Figs. 7 and 8, the frame has a guide pin 7c similar to andfunctioning like pin 7L. m is a pin secured in a lug a projecting towardthe center of the guide pin L.

ln Figs. 9 and 10, the frame has a pin 0, similar to pin m, projectingradially inward from the periphery of a socket p, similar to socket j.

The nut of a centrifugal bowl is ordinarily provided either with twoholes in its top adapted to receive two pins in a wrench, or with'radial holes in its circumference adapted to receive a pin in aSpanner. The two pinsg, c7 of Figs. 3 and 4, or the two pins z', z' ofFigs. 5 and 6, are of a size and a center distance adapted to 1 enterthe above mentioned holes in the top of the nut. The

`single pin m shown in Figs. 7 and 8, or the single pin o shown in Figs.9 and 10, is adapted to enter a spanner hole in the circumference of thenut.

When it is desired to disassemble a centrifugal bowl, the operatorpresents the nut to the frame,lwhere, guided by the guide pin 7L or k,or by the socket y' or p, it is easy to engage the top holes in the nutwith the pins i g, gjor i, z', or one of the radial holes in the nutwith the pin m or pin o. With both hands on the large diameter lowerportion of the bowl, the operator can turn it to loosen the nut. Thebowl may then be carried to any convenient place for washing. After thebowl is washed and assembled, the nut may be tightened in the samemanner.

Having now fully described my invention, what I claim and desire toprotect by Letters Patent is:

1. Means for unscrewing centrifugal bowls from their holding nutscomprising a ixedly positioned frame, means thereon engageable with thenut to prevent its rotation, and guiding means on the frame to guide thebowl nut into engagement with the rotation preventing means.

2. Means for unscrewing centrifugal bowls from their rholding nutscomprising a fixedly positioned frame, andmeans thereon adapted toengage the holding nut, when the bowl is brought to a position whereinits axis extends horizontally and is thrust laterally against theiframe, and hold said nut stationary while the bowl is turned to loosenthe nut.

3. Means for unscrewing centrifugal bowls from holding nuts having twowrenchengageable holes comprising a fixedly positioned frame, two pinsthereon adapted to be engaged with said holes, and guiding means on theframe to guide the nut into engagement with said pins.

4. Means for unscrewing a centrifugal bowl having a top hole from' aholding nut having a wrench-engaging hole, comprising a fixedlypositioned frame, a pin on the frame, and a guide pin on the frameadapted to engage the top hole of the bowl and vguide the hole of thenut into engagement with the pin on theframe.

5. Means for unscrewing centrifugal bowls having a top hole from holdingnuts having two wrenoh-engageable holes, coniprising a ixedly positionedframe, a guide pin thereon slightly smaller than the inside of the tophole of the bowl, and two adjacent pins adapted to enter the holes inthe bowl nut and prevent rotation of the nut when the bowl is turned.

In testimony of which invention, I have hereunto set my hand, atPoughkeepsie, N. Y., on this 11th day of February, 1919.

MEREDITH LEITCH.

